Exam 12: Introduction to Ventilators

Which of the following ventilator modes allow patients to perform part of the work of breathing? 1)Volume-support ventilation 2)Mandatory minute ventilation 3)Continuous mandatory ventilation 4)Proportional assist ventilation

Which type of ventilator creates a sinusoidal pressure waveform pattern of positive and negative pressures?

A patient is receiving a continuous positive airway pressure of 10 cm H₂O via mask from a Downs continuous positive airway pressure generator.During each inspiration,the pressure manometer decreases to 3 cm H₂O.The patient is diaphoretic,tachypneic,and tachycardic. To correct this situation,the respiratory therapist should do which of the following?

Which of the following is the technique that can actively remove gas from a ventilator circuit at the beginning of expiration?

Patient discomfort from rapid gas flow during pressure-targeted ventilation may be alleviated by which of the following adjustments to the ventilator?

An open-loop ventilator system can be described as which of the following?

What is the inspiratory time for a frequency of 30 breaths/min and an inspiratory time-to-expiratory time ratio of 1:3?

What is the static lung compliance when the returned tidal volume is 700 mL,the positive end-expiratory pressure is 10 cm H₂O,the peak inspiratory pressure is 45 cm H₂O,and the plateau pressure is 35 cm H₂O?

Which of the following modes is used for noninvasive positive-pressure ventilation?

What is the compressibility factor for the patient circuit when the ventilator volume is set at 100 mL,the recorded peak inspiratory pressure is 41 cm H₂O,and the measured volume is 68 mL?

What is the inspiratory time for a tidal volume of 600 mL and a flow rate of 60 L/min?

If the base flow is 8 L/min and the flow-trigger setting is 3 L/min,at what flow rate would the ventilator be triggered?

Auto-PEEP can be detected without the use of an expiratory pause on which of the following curves?

Increasing the functional residual capacity of a spontaneously breathing patient to improve oxygenation can be accomplished by which of the following?

A patient being ventilated in the volume-controlled continuous mandatory ventilation mode had a measured tidal volume of 620 mL for the breath shown in the pressure-time scalar in the figure.What is the static compliance?

Decreased lung compliance during pressure-limited ventilation would cause which of the following?

Pneumatic ventilators may incorporate which of the following components for operation? 1)Pistons 2)Air entrainers 3)Flexible diaphragms 4)Internal direct current batteries

Which of the following is a ventilator mode that allows the ventilator to switch from pressure control to volume control or vice versa?

Mandatory breaths during pressure-controlled mechanical ventilation (pressure-controlled continuous mandatory ventilation)are cycled into expiration by which of the following?

Which of the following statements is true concerning mechanical ventilation classification?